memchr.c

来自「linux内核」· C语言 代码 · 共 19 行

/*
 * memchr.c
 */

#include <stddef.h>
#include <string.h>

void *memchr(const void *s, int c, size_t n)
{
  const unsigned char *sp = s;

  while ( n-- ) {
    if ( *sp == (unsigned char)c )
      return (void *)sp;
  }

  return NULL;
}